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A256723
as a simple table
n
a(n)
1
2
2
5
3
8
4
18
5
38
6
1919
7
1934
8
4250
9
4397
10
12626
11
13151
12
26693
13
81353
14
83916
[2,5,8,18,38,1919,1934,4250,4397,12626,13151, 26693,81353,83916]